package tedu.api.collection;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SortInteger {
    public static void main(String[] args) {
        Random rand = new Random();
        List<Integer> list = new ArrayList<>();
        for(int i=0;i<10;i++){
            list.add(rand.nextInt(100));
        }
        System.out.println("list----原始："+list);//无序

        Collections.sort(list);//自然排序(从小到大)
        System.out.println("list----排序："+list);//有序

        Collections.reverse(list);//反转list集合(数据改变)
        System.out.println("list----反转："+list);
        System.out.println("list----反转：第一个元素"+list.get(0));


    }
}







